/* Engine AI — Editorial Fintech Landing */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@200;300;400;500;600&family=Instrument+Serif:ital@0;1&display=swap');

:root {
  --bg: #000000;
  --bg-elev: #07090d;
  --bg-navy: #0a1020;
  --bg-charcoal: #0e1116;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f6f8;
  --text-dim: rgba(245, 246, 248, 0.62);
  --text-faint: rgba(245, 246, 248, 0.38);
  --accent: #6aa9ff;          /* soft electric blue */
  --accent-glow: rgba(106, 169, 255, 0.35);
  --accent-soft: rgba(106, 169, 255, 0.12);
  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --sans: 'Inter', ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

body {
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: var(--accent-soft);
  color: var(--text);
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: #1a1f2a; border-radius: 10px; }

/* Layout helpers */
.shell {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--text-faint);
  display: inline-block;
}

/* Headlines */
.h-display {
  font-family: var(--sans);
  font-weight: 200;
  font-size: clamp(44px, 6.6vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0;
  color: var(--text);
}

.h-display .serif {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
}

.h-section {
  font-family: var(--sans);
  font-weight: 200;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0;
}

.h-section .serif {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
}

.lede {
  font-size: 17px;
  line-height: 1.55;
  font-weight: 300;
  color: var(--text-dim);
  max-width: 540px;
}

/* Glass treatment */
.glass {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025) 0%, rgba(255,255,255,0.005) 100%),
    rgba(10, 14, 22, 0.55);
  border: 1px solid var(--line);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
}

.glass-strong {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%),
    rgba(14, 18, 28, 0.7);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(28px) saturate(140%);
  -webkit-backdrop-filter: blur(28px) saturate(140%);
}

/* CTA */
.cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 16px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--text);
  text-decoration: none;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)),
    rgba(8, 12, 20, 0.6);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  cursor: pointer;
  transition: all 0.4s cubic-bezier(.2,.7,.2,1);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.08),
    0 1px 0 rgba(0,0,0,0.6),
    0 20px 40px -20px rgba(106,169,255,0.25);
}

.cta:hover {
  border-color: rgba(106,169,255,0.45);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 0 0 1px rgba(106,169,255,0.08),
    0 30px 60px -20px rgba(106,169,255,0.45);
  transform: translateY(-1px);
}

.cta .arrow {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  color: #000;
  transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}

.cta:hover .arrow { transform: translateX(2px); }

.cta-ghost {
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--line);
  box-shadow: none;
}
.cta-ghost:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(255,255,255,0.02);
}

/* Section */
section {
  position: relative;
  width: 100%;
}

.divider {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

/* Glow */
.glow {
  position: absolute;
  pointer-events: none;
  filter: blur(80px);
  opacity: 0.6;
  z-index: 0;
}

/* Subtle grid */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  pointer-events: none;
  opacity: 0.5;
}

/* Noise overlay */
.noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* Hover-reactive accent line */
.accent-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}

/* Section number tag */
.sec-num {
  font-family: var(--serif);
  font-style: italic;
  color: var(--text-faint);
  font-size: 14px;
  font-weight: 400;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Hide scrollbar utility */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { scrollbar-width: none; }

/* fade-in on intersection */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
}
.fade-up.in {
  opacity: 1;
  transform: translateY(0);
}